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| Mirrors > Home > ILE Home > Th. List > ballotfilemscl | GIF version | ||
| Description: The set of zeroes of 𝐹 has an infimum. (Contributed by Jim Kingdon, 12-Jun-2026.) |
| Ref | Expression |
|---|---|
| ballotth.m | ⊢ 𝑀 ∈ ℕ |
| ballotth.n | ⊢ 𝑁 ∈ ℕ |
| ballotfilem.o | ⊢ 𝑂 = {𝑐 ∈ (𝒫 (1...(𝑀 + 𝑁)) ∩ Fin) ∣ (♯‘𝑐) = 𝑀} |
| ballotfilem.p | ⊢ 𝑃 = (𝑥 ∈ (𝒫 𝑂 ∩ Fin) ↦ ((♯‘𝑥) / (♯‘𝑂))) |
| ballotth.f | ⊢ 𝐹 = (𝑐 ∈ 𝑂 ↦ (𝑖 ∈ ℤ ↦ ((♯‘((1...𝑖) ∩ 𝑐)) − (♯‘((1...𝑖) ∖ 𝑐))))) |
| ballotth.e | ⊢ 𝐸 = {𝑐 ∈ 𝑂 ∣ ∀𝑖 ∈ (1...(𝑀 + 𝑁))0 < ((𝐹‘𝑐)‘𝑖)} |
| ballotth.mgtn | ⊢ 𝑁 < 𝑀 |
| ballotth.i | ⊢ 𝐼 = (𝑐 ∈ (𝑂 ∖ 𝐸) ↦ inf({𝑘 ∈ (1...(𝑀 + 𝑁)) ∣ ((𝐹‘𝑐)‘𝑘) = 0}, ℝ, < )) |
| ballotfilemscl.s | ⊢ 𝑆 = {𝑘 ∈ (1...(𝑀 + 𝑁)) ∣ ((𝐹‘𝐶)‘𝑘) = 0} |
| Ref | Expression |
|---|---|
| ballotfilemscl | ⊢ (𝐶 ∈ (𝑂 ∖ 𝐸) → inf(𝑆, ℝ, < ) ∈ 𝑆) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ballotth.m | . . 3 ⊢ 𝑀 ∈ ℕ | |
| 2 | ballotth.n | . . 3 ⊢ 𝑁 ∈ ℕ | |
| 3 | ballotfilem.o | . . 3 ⊢ 𝑂 = {𝑐 ∈ (𝒫 (1...(𝑀 + 𝑁)) ∩ Fin) ∣ (♯‘𝑐) = 𝑀} | |
| 4 | ballotfilem.p | . . 3 ⊢ 𝑃 = (𝑥 ∈ (𝒫 𝑂 ∩ Fin) ↦ ((♯‘𝑥) / (♯‘𝑂))) | |
| 5 | ballotth.f | . . 3 ⊢ 𝐹 = (𝑐 ∈ 𝑂 ↦ (𝑖 ∈ ℤ ↦ ((♯‘((1...𝑖) ∩ 𝑐)) − (♯‘((1...𝑖) ∖ 𝑐))))) | |
| 6 | ballotth.e | . . 3 ⊢ 𝐸 = {𝑐 ∈ 𝑂 ∣ ∀𝑖 ∈ (1...(𝑀 + 𝑁))0 < ((𝐹‘𝑐)‘𝑖)} | |
| 7 | ballotth.mgtn | . . 3 ⊢ 𝑁 < 𝑀 | |
| 8 | 1, 2, 3, 4, 5, 6, 7 | ballotfilem5 13244 | . 2 ⊢ (𝐶 ∈ (𝑂 ∖ 𝐸) → ∃𝑗 ∈ (1...(𝑀 + 𝑁))((𝐹‘𝐶)‘𝑗) = 0) |
| 9 | ballotfilemscl.s | . . 3 ⊢ 𝑆 = {𝑘 ∈ (1...(𝑀 + 𝑁)) ∣ ((𝐹‘𝐶)‘𝑘) = 0} | |
| 10 | simpr 110 | . . . 4 ⊢ ((𝐶 ∈ (𝑂 ∖ 𝐸) ∧ (𝑗 ∈ (1...(𝑀 + 𝑁)) ∧ ((𝐹‘𝐶)‘𝑗) = 0)) → (𝑗 ∈ (1...(𝑀 + 𝑁)) ∧ ((𝐹‘𝐶)‘𝑗) = 0)) | |
| 11 | fveqeq2 5704 | . . . . 5 ⊢ (𝑘 = 𝑗 → (((𝐹‘𝐶)‘𝑘) = 0 ↔ ((𝐹‘𝐶)‘𝑗) = 0)) | |
| 12 | 11, 9 | elrab2 2985 | . . . 4 ⊢ (𝑗 ∈ 𝑆 ↔ (𝑗 ∈ (1...(𝑀 + 𝑁)) ∧ ((𝐹‘𝐶)‘𝑗) = 0)) |
| 13 | 10, 12 | sylibr 134 | . . 3 ⊢ ((𝐶 ∈ (𝑂 ∖ 𝐸) ∧ (𝑗 ∈ (1...(𝑀 + 𝑁)) ∧ ((𝐹‘𝐶)‘𝑗) = 0)) → 𝑗 ∈ 𝑆) |
| 14 | eldifi 3351 | . . . . . 6 ⊢ (𝐶 ∈ (𝑂 ∖ 𝐸) → 𝐶 ∈ 𝑂) | |
| 15 | 14 | ad2antrr 492 | . . . . 5 ⊢ (((𝐶 ∈ (𝑂 ∖ 𝐸) ∧ (𝑗 ∈ (1...(𝑀 + 𝑁)) ∧ ((𝐹‘𝐶)‘𝑗) = 0)) ∧ 𝑘 ∈ (1...𝑗)) → 𝐶 ∈ 𝑂) |
| 16 | elfzelz 10430 | . . . . . 6 ⊢ (𝑘 ∈ (1...𝑗) → 𝑘 ∈ ℤ) | |
| 17 | 16 | adantl 277 | . . . . 5 ⊢ (((𝐶 ∈ (𝑂 ∖ 𝐸) ∧ (𝑗 ∈ (1...(𝑀 + 𝑁)) ∧ ((𝐹‘𝐶)‘𝑗) = 0)) ∧ 𝑘 ∈ (1...𝑗)) → 𝑘 ∈ ℤ) |
| 18 | 1, 2, 3, 4, 5, 15, 17 | ballotfilemfelz 13232 | . . . 4 ⊢ (((𝐶 ∈ (𝑂 ∖ 𝐸) ∧ (𝑗 ∈ (1...(𝑀 + 𝑁)) ∧ ((𝐹‘𝐶)‘𝑗) = 0)) ∧ 𝑘 ∈ (1...𝑗)) → ((𝐹‘𝐶)‘𝑘) ∈ ℤ) |
| 19 | 0z 9657 | . . . 4 ⊢ 0 ∈ ℤ | |
| 20 | zdceq 9722 | . . . 4 ⊢ ((((𝐹‘𝐶)‘𝑘) ∈ ℤ ∧ 0 ∈ ℤ) → DECID ((𝐹‘𝐶)‘𝑘) = 0) | |
| 21 | 18, 19, 20 | sylancl 417 | . . 3 ⊢ (((𝐶 ∈ (𝑂 ∖ 𝐸) ∧ (𝑗 ∈ (1...(𝑀 + 𝑁)) ∧ ((𝐹‘𝐶)‘𝑗) = 0)) ∧ 𝑘 ∈ (1...𝑗)) → DECID ((𝐹‘𝐶)‘𝑘) = 0) |
| 22 | 9, 13, 21 | infssfzcldc 10671 | . 2 ⊢ ((𝐶 ∈ (𝑂 ∖ 𝐸) ∧ (𝑗 ∈ (1...(𝑀 + 𝑁)) ∧ ((𝐹‘𝐶)‘𝑗) = 0)) → inf(𝑆, ℝ, < ) ∈ 𝑆) |
| 23 | 8, 22 | rexlimddv 2673 | 1 ⊢ (𝐶 ∈ (𝑂 ∖ 𝐸) → inf(𝑆, ℝ, < ) ∈ 𝑆) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 104 DECID wdc 846 = wceq 1402 ∈ wcel 2209 ∀wral 2528 {crab 2532 ∖ cdif 3217 ∩ cin 3219 𝒫 cpw 3688 class class class wbr 4130 ↦ cmpt 4192 ‘cfv 5377 (class class class)co 6085 Fincfn 7022 infcinf 7323 ℝcr 8178 0cc0 8179 1c1 8180 + caddc 8182 < clt 8360 − cmin 8497 / cdiv 9003 ℕcn 9305 ℤcz 9646 ...cfz 10413 ♯chash 11216 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-coll 4246 ax-sep 4249 ax-nul 4259 ax-pow 4311 ax-pr 4346 ax-un 4578 ax-setind 4684 ax-iinf 4735 ax-cnex 8270 ax-resscn 8271 ax-1cn 8272 ax-1re 8273 ax-icn 8274 ax-addcl 8275 ax-addrcl 8276 ax-mulcl 8277 ax-mulrcl 8278 ax-addcom 8279 ax-mulcom 8280 ax-addass 8281 ax-mulass 8282 ax-distr 8283 ax-i2m1 8284 ax-0lt1 8285 ax-1rid 8286 ax-0id 8287 ax-rnegex 8288 ax-precex 8289 ax-cnre 8290 ax-pre-ltirr 8291 ax-pre-ltwlin 8292 ax-pre-lttrn 8293 ax-pre-apti 8294 ax-pre-ltadd 8295 ax-pre-mulgt0 8296 ax-pre-mulext 8297 |
| This proof depends on definitions: df-bi 117 df-dc 847 df-3or 1010 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-reu 2535 df-rmo 2536 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-nul 3521 df-if 3639 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-iun 4014 df-br 4131 df-opab 4193 df-mpt 4194 df-tr 4230 df-id 4438 df-po 4441 df-iso 4442 df-iord 4511 df-on 4513 df-ilim 4514 df-suc 4516 df-iom 4738 df-xp 4780 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-rn 4785 df-res 4786 df-ima 4787 df-iota 5337 df-fun 5379 df-fn 5380 df-f 5381 df-f1 5382 df-fo 5383 df-f1o 5384 df-fv 5385 df-isom 5386 df-riota 6038 df-ov 6088 df-oprab 6089 df-mpo 6090 df-1st 6374 df-2nd 6375 df-recs 6576 df-irdg 6641 df-frec 6662 df-1o 6687 df-oadd 6691 df-er 6807 df-en 7023 df-dom 7024 df-fin 7025 df-sup 7324 df-inf 7325 df-pnf 8362 df-mnf 8363 df-xr 8364 df-ltxr 8365 df-le 8366 df-sub 8499 df-neg 8500 df-reap 8904 df-ap 8911 df-div 9004 df-inn 9306 df-2 9364 df-n0 9566 df-z 9647 df-uz 9924 df-q 10022 df-rp 10057 df-fz 10414 df-fzo 10552 df-ihash 11217 |
| This theorem is used by: ballotfilemfrcn0 13275 |
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